Method to sort a list of lists?

Question

I have a list of lists (can\'t be tuples since I have to generate it dynamically) and it is structured as a list of lists of one int and one float Like so:

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Answer 1

>>> l = [[1,1.0345],[2,5.098],[3,4.89],[2,5.97]]
>>> l.sort(key=lambda x: x[1])
>>> l
[[1, 1.0345], [3, 4.8899999999999997], [2, 5.0979999999999999], [2, 5.9699999999999998]]